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S21800 Stainless Steel vs. AISI 436 Stainless Steel

Both S21800 stainless steel and AISI 436 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 80% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is AISI 436 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
170
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
25
Fatigue Strength, MPa 330
190
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 88
77
Shear Modulus, GPa 75
77
Shear Strength, MPa 510
320
Tensile Strength: Ultimate (UTS), MPa 740
500
Tensile Strength: Yield (Proof), MPa 390
270

Thermal Properties

Latent Heat of Fusion, J/g 340
280
Maximum Temperature: Corrosion, °C 410
460
Maximum Temperature: Mechanical, °C 900
880
Melting Completion (Liquidus), °C 1360
1450
Melting Onset (Solidus), °C 1310
1410
Specific Heat Capacity, J/kg-K 500
480
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 15
12
Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 3.1
2.7
Embodied Energy, MJ/kg 45
38
Embodied Water, L/kg 150
120

Common Calculations

PREN (Pitting Resistance) 19
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
110
Resilience: Unit (Modulus of Resilience), kJ/m3 390
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
18
Strength to Weight: Bending, points 24
18
Thermal Shock Resistance, points 17
18

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.12
Chromium (Cr), % 16 to 18
16 to 18
Iron (Fe), % 59.1 to 65.4
77.8 to 83.3
Manganese (Mn), % 7.0 to 9.0
0 to 1.0
Molybdenum (Mo), % 0
0.75 to 1.3
Nickel (Ni), % 8.0 to 9.0
0
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 3.5 to 4.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030